Hidden non-contact pipe pressure monitoring device

Abstract

The utility model relates to a hidden non-contact tube pressure monitoring device in the technical field of medical equipment, which comprises a perfusion pump, the perfusion pump comprises a perfusion pump body and a silicone tube, a channel is arranged in the perfusion pump body, and the silicone tube penetrates through the channel; a pressure sensor is arranged at an outlet of the channel, a driving space is formed in the middle of the channel, a driving assembly is arranged in the driving space, the silicone tube passes through the upper portion of the driving assembly, the driving assembly comprises a rotating shaft, the rotating shaft is perpendicular to the silicone tube, a plurality of rolling wheels are fixed to the rotating shaft in the circumferential direction, the rotating shaft is connected with a stepping motor, and the stepping motor is connected with the silicone tube. The stepping motor and the pressure sensor are both electrically connected with the filling pump. According to the utility model, the overall structure is simple and reasonable, the pressure in the silicone tube can be monitored, the action of the perfusion pump can be flexibly controlled according to conditions, the pressure of the silicone tube can be relieved, the risk caused by overhigh pressure in the silicone tube is avoided, and the safety of an operation is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a hidden non-contact pipe pressure monitoring device. Background Art

[0002] Irrigation pumps are primarily used in various minimally invasive surgeries and are essential for many intracavitary procedures in urology. Irrigation pumps work with silicone tubing and then, through surgical instruments, inject fluid into the cavity. The injected fluid flushes out intraoperative bleeding and stone powder, maintains a clear endoscopic field of view, and simultaneously opens the cavity to maintain the necessary space for surgery and removes heat generated by lithotripsy instruments. Prior art medical irriga- tion pumps lack silicone tubing pressure detection devices. Endoscopic surgical instruments typically have a mechanical on / off valve that allows the surgeon to control infusion. When the on / off valve is closed, the irriga- tion pump continues to infuse, resulting in a persistent high pressure within the silicone tubing used for infusion. Excessive pressure can open the silicone tubing joints, causing liquid to spray out and potentially posing other risks. Manually shutting off the irriga- tion pump can reduce these risks, but high pressure still remains within the silicone tubing, and the pressure release after opening the on / off valve can also create a risk of transient high pressure within the cavity for the patient. Therefore, to improve surgical safety, a hidden, non-contact tubing pressure monitoring device is needed to address the aforementioned technical issues. Utility Model Content

[0003] To address the aforementioned deficiencies in the prior art, the present invention provides a concealed, non-contact pipe pressure monitoring device, comprising an infusion pump, the infusion pump comprising an infusion pump body and a silicone tube. A channel is defined within the infusion pump body, through which the silicone tube passes; a pressure sensor is provided at the outlet of the channel; a drive space is defined in the middle of the channel, within which a drive assembly is located, through which the silicone tube passes; the drive assembly comprises a rotating shaft perpendicular to the silicone tube, with a plurality of rollers circumferentially fixed to the rotating shaft; a stepper motor is connected to the rotating shaft, and both the stepper motor and the pressure sensor are electrically connected to the infusion pump. The pressure sensor is concealed within the infusion pump body and is non-contact with the infusion liquid.

[0004] Preferably, a detachable pressing block is provided in the channel above the silicone tube, and the pressing block is used to press the silicone tube. The silicone tube in the channel can be taken out by removing the pressing block.

[0005] Preferably, there are four rollers. The stepper motor drives the rotating shaft to rotate, and each roller contacts the silicone tube in turn, periodically applying pressure to the silicone tube. If the front of the silicone tube is blocked and pressure continues to accumulate, the pressure in the silicone tube detected by the pressure sensor will continue to increase.

[0006] Preferably, a sensor isolation block is provided between the pressure sensor and the silicone tube, and the sensor isolation block is used to indirectly transmit pressure to the sensor.

[0007] Preferably, the perfusion pump is connected to a controller, and both the pressure sensor and the stepper motor are electrically connected to the controller.

[0008] In the present utility model, one end of the silicone tube is connected to a flushing liquid storage device (such as a physiological saline bag), and the other end is connected to a surgical instrument endoscope. The silicone tube obtains the perfusion liquid from the physiological saline bag, and the pressure sensor is used to detect the tension generated during the perfusion of the silicone tube.

[0009] The present utility model further includes other components that can enable a hidden non-contact tube pressure monitoring device to be used normally, such as the control components of the stepper motor, the control components of the perfusion pump, the control components of the pressure sensor, the flushing liquid storage device connected to the silicone tube, and the surgical instrument endoscope, etc., which are all commonly used devices in the art and are conventional technical means in the art. In addition, the devices or components not defined in the present utility model, such as the flushing liquid storage device, the endoscope, the silicone tube, the pressure sensor, the sensor isolation block, etc., all adopt the conventional technical means and conventional devices in the art.

[0010] Working principle: The silicone tube obtains the perfusion liquid from the physiological saline bag under the action of the perfusion pump. The pressure sensor is used to detect the tension generated during the perfusion of the silicone tube and transmit the pressure signal to the controller. When the pressure signal is normal, the perfusion pump operates normally. When the pressure signal is abnormal, the perfusion pump stops working. In addition, the perfusion pump can be controlled to run reversely as needed to relieve the pressure in the silicone tube. During the above process, the stepper motor drives the rotating shaft to rotate continuously, and each roller contacts the silicone tube in turn to apply periodic pressure to the silicone tube. If the front of the silicone tube is blocked or the perfusion outlet is small, and the pressure accumulates continuously, the pressure in the silicone tube detected by the pressure sensor will increase continuously. The pressure sensor transmits the signal to the controller to control the perfusion pump to perform corresponding operations.

[0011] Advantages of the present utility model: The overall structure is simple and reasonable, which can perform non-contact monitoring of the liquid pressure in the silicone tube, avoid cross-infection, and at the same time flexibly control the operation of the perfusion pump according to the monitoring situation to timely control the pressure in the silicone tube, avoid risks caused by too high pressure in the silicone tube, and improve the safety of the operation. Brief Description of the Drawings

[0012] The present utility model will be further described below with reference to the drawings and embodiments.

[0013] Figure 1 is a schematic diagram of the use of a hidden non-contact tube pressure monitoring device in an embodiment of the present utility model;

[0014] Figure 2 is Figure 1 a right view of a hidden non-contact tube pressure monitoring device in

[0015] Figure 3 is Figure 2 the sectional view at A-A in the figure;

[0016] Figure 4 is the circuit schematic diagram of a hidden non-contact tube pressure monitoring device in an embodiment of the present invention;

[0017] Figure 5 is the control method flow chart of a hidden non-contact tube pressure monitoring device in an embodiment of the present invention.

[0018] In the figure: 1, normal saline bag; 2, silicone tube; 3, sensor isolation block; 4, pressing block; 5, perfusion pump body; 6, wire; 7, endoscope; 8, mechanical switch valve; 9, object to be flushed; 10, roller; 11, pressure sensor; 12, rotating shaft; 13, channel. Specific embodiments

[0019] The present invention will be clearly described below in conjunction with the drawings in the embodiments of the present invention and specific embodiments. The description here is only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

[0020] Embodiment

[0021] As Figures 1-5 shown, the present invention provides a hidden non-contact tube pressure monitoring device, including a perfusion pump. The perfusion pump includes a perfusion pump body 5 and a silicone tube 2. A channel 13 is provided in the perfusion pump body 5, and the silicone tube 2 passes through the channel 13; a pressure sensor 11 is provided at the outlet of the channel. The pressure sensor 11 is connected with a wire 6 for transmitting pressure signals. A driving space is provided in the middle of the channel. A driving assembly is provided in the driving space. The silicone tube 2 passes above the driving assembly. The driving assembly includes a rotating shaft 12. The rotating shaft 12 is perpendicular to the silicone tube 2. A plurality of rollers 10 are circumferentially fixed on the rotating shaft 12. The rotating shaft 12 is connected with a stepping motor. Both the stepping motor and the pressure sensor 11 are electrically connected to the perfusion pump. The pressure sensor is hidden in the perfusion pump body and is non-contact with the perfusion liquid

[0022] A detachable pressing block 4 is provided in the channel above the silicone tube 2, and can be detachably connected to the perfusion pump body by bolts. The pressing block 4 is used to press the silicone tube 2. The silicone tube 2 in the channel can be taken out by removing the pressing block 4.

[0023] Four rollers 10 are provided. The stepping motor drives the rotation of the rotating shaft 12, and each roller 10 contacts the silica gel tube 2 in turn, applying periodic pressure to the silica gel tube 2. If the front of the silica gel tube 2 is blocked and the pressure accumulates continuously, the pressure in the silica gel tube 2 detected by the pressure sensor 11 will increase continuously.

[0024] A sensor isolation block 3 is provided between the pressure sensor 11 and the silica gel tube 2. The sensor isolation block 3 is used to indirectly transmit the pressure to the sensor.

[0025] The perfusion pump is connected to a controller, and the pressure sensor 11 and the stepping motor are both electrically connected to the controller.

[0026] In the present utility model, one end of the silica gel tube 2 is connected to a flushing liquid storage device (such as a physiological saline bag 1), and the other end is connected to a surgical instrument (endoscope 7). A mechanical switch valve 8 is provided on the endoscope 7. The endoscope extends into the flushing object 9 (body cavity). The silica gel tube 2 obtains the perfusion liquid from the physiological saline bag 1, and the pressure sensor 11 is used to detect the tension generated during the perfusion of the silica gel tube 2.

[0027] During use, the silica gel tube obtains the perfusion liquid from the physiological saline bag under the action of the perfusion pump. The pressure sensor is used to detect the tension generated during the perfusion of the silica gel tube and transmit the pressure signal to the controller. When the pressure signal is normal, the perfusion pump operates normally. When the pressure signal is abnormal, the perfusion pump stops working. In addition, the perfusion pump can be controlled to run reversely as needed to relieve the pressure in the silica gel tube. In the above process, the stepping motor drives the rotating shaft to rotate continuously, and each roller contacts the silica gel tube in turn, applying periodic pressure to the silica gel tube. If the front of the silica gel tube is blocked and the pressure accumulates continuously, the pressure in the silica gel tube detected by the pressure sensor will increase continuously. The pressure sensor transmits the signal to the controller to control the perfusion pump to perform corresponding operations.

[0028] The pressure sensor 11 monitors the tension of the silica gel tube to obtain the original pressure signal. The pressure sensor transmits the signal to the controller through the wire 6. The pressure signal undergoes hardware filtering of interference through a pre-filter (generally through a lightning protection tube, common mode inductor, resistor-capacitor). The filtered signal is converted into a digital signal through analog-to-digital conversion (including signal gain). The digital signal is transmitted to the processing unit through electrical isolation. The purpose of electrical isolation is to meet the requirements of medical electrical inspection. The processing unit (controller) controls the execution unit (perfusion pump) based on the pressure sensor signal collected, realizing a closed-loop process.

[0029] Specifically, when the silicone tube is not placed on the pressure sensor (when the silicone tube is not in the channel), the value collected by the pressure sensor defines the no-load value. The no-load value is generally a fixed value determined by the factory properties of the pressure sensor; the mark value is the pressure sensor collection value when identifying whether the silicone tube has been pressed into the channel. When the real-time collection value is less than the mark value, it means that the silicone tube is not installed. At this time, the perfusion pump cannot be started. There is a certain offset between the mark value and the no-load value, which is generally also a fixed value; the reference value is the pressure reference point collected when the perfusion pump is started. It is taken once after the mark value is valid and is activated again after the mark value expires. Due to the differences in silicone tubes, the pressure reference point is floating; the release value is a calculated value, generally reference value + (limit value - reference value) · 40%, that is, the pressure reference value of the release pressure. The release pressure is achieved by reverse controlling the perfusion pump; the limit value is the lower limit of the perfusion pump stop, which is determined according to the reference value. Generally, the offset from the reference value to the limit value is certain.

[0030] In this embodiment, the pressure sensor for monitoring the pressure inside the rubber hose is hidden and does not require the user to perform any additional work; the pressure sensor monitors the tension of the silicone tube and has no direct contact with the perfusion liquid, so there is no risk of cross infection and electric shock; the perfusion pump can be automatically started and stopped and the silicone tube pressure can be relieved according to the pressure monitoring status, thereby avoiding the high-pressure release of residual liquid and the occurrence of adverse phenomena such as continuous high pressure in the silicone tube pushing the silicone tube connection open and spraying liquid.

[0031] While the embodiments of the present invention have been described above, the foregoing description is intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Numerous modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A hidden non-contact tube pressure monitoring device, comprising a perfusion pump, the perfusion pump including a perfusion pump body and a silicone tube, a channel being provided in the perfusion pump body, and the silicone tube passing through the channel; characterized in that: A pressure sensor is provided at the outlet of the channel. A driving space is provided in the middle of the channel. A driving assembly is provided in the driving space. The silicone tube passes above the driving assembly. The driving assembly includes a rotating shaft, the rotating shaft is perpendicular to the silicone tube, and a plurality of rollers are fixedly arranged on the rotating shaft along the circumferential direction. The rotating shaft is connected to a stepping motor.

2. The hidden non-contact tube pressure monitoring device according to claim 1, characterized in that: A detachable pressing block is provided in the channel above the silicone tube. The silicone tube in the channel can be taken out by removing the pressing block.

3. The non-contact pipe pressure monitoring device according to claim 1, characterized in that: A sensor isolation block is provided between the pressure sensor and the silicone tube.

4. The hidden non-contact tube pressure monitoring device according to claim 1, wherein: The perfusion pump is connected to a controller, and both the pressure sensor and the stepping motor are electrically connected to the controller.

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